Manuals / Motorola / Home Audio / Stereo System

Motorola DSP56301 user manual Program Memory Space, Memory Configuration

Models: DSP56301

1 372
Download 372 pages 304 b
Page 61
Image 61

Chapter 3

Memory Configuration

Like all members of the DSP56300 core family, the DSP56301 addresses three sets of

16 M × 24-bit memory: program, X data, and Y data. Each of these memory spaces includes both on-chip and external memory (accessed through the external memory interface). The DSP56301 is extremely flexible because it has several modes to allocate on-chip memory between the program memory and the two data memory spaces. You can also configure it to operate in a special sixteen-bit compatibility mode that allows the chip to use DSP56000 object code without any change; this can result in higher performance of existing code for applications that do not require a larger address space. This section provides detailed information on each of these memory spaces.

3.1Program Memory Space

Program memory space consists of the following:

νInternal program RAM (4 K by default)

νInstruction cache (optional, 1 K) formed from program RAM. When enabled, the memory addresses used by the internal cache memory are switched to external memory. The internal memory in this address range switches to cache-only mode and is not available via direct addressing when cache is enabled. In systems using Instruction Cache, always enable the cache (CE = 1) before loading code into internal program memory; this prevents the condition in which code loaded into program memory before cache is enabled “disappears” after cache is enabled.

νOff-chip memory expansion (optional, as much as 64 K in 16-bit mode or 16 M in

24-bit mode). Refer to the DSP56300 Family Manual, especially Chapter 9, External Memory Interface (Port A), for details on using the external memory interface to access external program memory.

νBootstrap program ROM (3 K × 24-bit)

Note: Early versions of the DSP56301 used a 192 × 24-bit bootstrap ROM space.

Note: Program memory space at locations $FF00C0–$FFFFFF is reserved and should not be accessed.

Memory Configuration

3-1

Page 60 Page 62
Page 61
Image 61
Motorola DSP56301 user manual Program Memory Space, Memory Configuration
Page 60 Page 62

DSP56301 specifications

The Motorola DSP56301 is a highly efficient digital signal processor, specifically engineered for real-time audio and speech processing applications. This DSP is part of Motorola's renowned DSP56300 family, which is recognized for its innovative features and outstanding performance in the realm of digital signal processing.

One of the main features of the DSP56301 is its ability to handle complex computations at high speeds. With a maximum clock frequency of 66 MHz, it delivers fast performance, enabling it to process audio signals in real time. The chip is built on a 24-bit architecture, which allows for high-resolution audio processing. This is particularly beneficial in applications such as telecommunications, consumer audio devices, and professional audio equipment, where precision is paramount.

The DSP56301 boasts a comprehensive instruction set that includes efficient mathematical operations, which are essential for digital filters and audio effects processing. One of the key innovations of this device is its dual data path architecture, which permits simultaneous processing of multiple data streams. This feature significantly enhances the device's throughput and responsiveness, making it suitable for demanding applications such as voice recognition and synthesis.

In terms of memory regions, the DSP56301 includes several on-chip memory categories, such as program memory, data memory, and a specialized memory for coefficients. The architecture's support for external memory expansion further increases its versatility, allowing designers to tailor systems to their specific requirements.

The DSP56301 implements advanced features such as a powerful on-chip hardware multiplier and accumulator, simplifying complex mathematical tasks and accelerating the execution of algorithms. Its flexible interrupt system enhances its capability to respond to time-sensitive operations, while the integrated serial ports facilitate efficient data communication with external devices.

Power consumption is also a vital characteristic of the DSP56301. It is designed with energy efficiency in mind, allowing for extended operation in battery-powered devices. The chip’s low power requirements are particularly advantageous in portable audio devices and other applications where energy conservation is crucial.

In conclusion, the Motorola DSP56301 is an exceptional digital signal processor that combines high processing power, flexibility, and efficiency. Its main features, advanced technologies, and robust architecture make it a top choice for developers seeking to create sophisticated audio and signal processing systems. With its enduring legacy in the industry, the DSP56301 continues to be relevant in a variety of modern applications, ensuring it remains a valuable tool for engineers and designers.